Почему изменение параметра шаблона при вызове функции даёт неверный результат?

    #include <opencv2/highgui/highgui.hpp>
    #include <opencv2/imgproc.hpp>
 
    #include <iostream>
 
 
    int main(int argc, char** argv) {
 
        cv::Mat points4d = (cv::Mat_<float>(4, 1)
            << -0.16131888, 0.083065912, 0.44372728, 0.87760037);
 
        std::cout << points4d << std::endl;
 
        for (int i = 0, cols = points4d.cols; i < cols; i++) {
 
            std::cout << "points4d.at<float>(0, i): " << points4d.at<float>(0, i) << std::endl;
            std::cout << "points4d.at<float>(1, i): " << points4d.at<float>(1, i) << std::endl;
            std::cout << "points4d.at<float>(2, i): " << points4d.at<float>(2, i) << std::endl;
            std::cout << "points4d.at<float>(0, i) / points4d.at<float>(3, i): "
                      << points4d.at<float>(0, i) / points4d.at<float>(3, i) << std::endl;
            std::cout << "points4d.at<float>(1, i) / points4d.at<float>(3, i): "
                      << points4d.at<float>(1, i) / points4d.at<float>(3, i) << std::endl;
            std::cout << "points4d.at<float>(2, i) / points4d.at<float>(3, i): "
                      << points4d.at<float>(2, i) / points4d.at<float>(3, i) << std::endl;
 
            std::cout << "points4d.at<double>(0, i): " << points4d.at<double>(0, i) << std::endl;
            std::cout << "points4d.at<double>(1, i): " << points4d.at<double>(1, i) << std::endl;
            std::cout << "points4d.at<double>(2, i): " << points4d.at<double>(2, i) << std::endl;
            std::cout << "points4d.at<double>(0, i) / points4d.at<double>(3, i): "
                              << points4d.at<double>(0, i) / points4d.at<double>(3, i) << std::endl;
            std::cout << "points4d.at<double>(1, i) / points4d.at<double>(3, i): "
                              << points4d.at<double>(1, i) / points4d.at<double>(3, i) << std::endl;
            std::cout << "points4d.at<double>(2, i) / points4d.at<double>(3, i): "
                              << points4d.at<double>(2, i) / points4d.at<double>(3, i) << std::endl;
 
        }
    }

-Wall -Wextra -pedantic -std=c++17